[Vwdiesel] Strange IP Problem

[James Hansen]

I agree Andrew.
Try a huge shot of Stanadyne, or some lubro-moly diesel purge.
I'm not a believer of a fix in a can, but those two are as close as it 
gets.  If it is varnish causing an internal part to hang, then this 
should alleviate it.  Beyond that, it's R&R...

For the pump to drop off to idle, you have to loose internal pressure, 
or the governor has to fail.  This would be one of those times a 
pressure gauge on the pump internal pressure may tell you something.

I suspect something mechanical however.  I had a cat motor that would 
act real screwy, sometimes similar to your stress, sometimes idle would 
be gone and everything else would work.  Turned out that the recently 
rebuilt pump was missing a few fasteners internally... the noob that 
rebuilt it at Cat was still climbing the learning curve using my pump as 
a crampon.  I guess I shouldn't say the fasteners were missing; they 
weren't missing.  They were still there, but just not in the threaded 
holes they were intended to be in.

You might as well just get a different pump and prevent this one from 
making you walk someday soon.


-James

Libbybapa at wmconnect.com wrote:
> In a message dated 8/25/06 8:10:19 PM US Mountain Standard Time, 
> val at mongobird.com writes:
> 
> 
>> His take is that the sleeve
>> which slides demanding higher injection levels may be hanging up.  A small
>> piece or dirt or wear.  Just a theory.
> 
> I don't like that theory at all.  If the sleeve were hanging up I would think 
> that it would either runaway up to the governor limit (if the bleed hole were 
> covered) or drop off completely (if the bleed weren't covered) due to zero 
> pressure being developed and no injectors firing.  Either way it wouldn't idle.  
> Experts, jeesh.  He'd charge you $250 to tell you his theory wasn't correct...
> 
> Andrew
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